Spool and lifting member thereof



Oct. 4, 1966 w. L. LEWIS ETAL SPOOL AND LIFTING MEMBER THEREOF FiledAug. 13, 1965 INVENTORJ WILLIAM L. LEWIS ROBERT E. POMERANZ ATTORNEYUnited States Patent 3,276,717 SPOOL AND LIFTING MEMBER THEREOF WilliamL. Lewis and Robert E. Pomeranz, Sanford, N.C.,

assignors to Roberts Company, Sanford, N.C., a corporation of NorthCarolina Filed Aug. 13, 1963, Ser. No. 301,805 1 Claim. (Cl. 242118.61)

This invention relates to double-headed bobbins of light weight, highimpact resistance capable of operation at high rotational speeds withminimum vibration.

Heretofore bobbins or spools for textiles whether for cotton yarns orblends utilizing synthetic fibers have been prefabricated utilizingrather dense fiberboard composed of hard vulcanized fibre that areeither cut or stamped out of sheets of material and trimmed on a lathe,and subsequently polished to the desired extent in order to provide anentirely smooth face and edge surf-aces resulting in many costlyoperations.

The objective of the present invention is to provide a relatively lowcost and high quality spool or bobbin that requires a minimum offinishing operations, and one that is very light, well balanceddynamically which also has extremely high impact resistance and one thatwill operate at high speeds of rotation with minimum vibrationeliminating the problems of poor balance and dynamic balancingcharacteristic of prior bobbins and spools.

Other advantages will be readily apparent from the following descriptiontaken in conjunction with the accompanying drawing, in which:

FIG. 1 is a perspective view of a spool embodying this invention;

FIG. 2 is an exploded and enlarged perspective view of each of theelements forming this new spool;

FIG. 3 is a perspective view of the bottom face of one of the flangesemployed with this new spool; and

FIG. 4 is a perspective View illustrating a modified spool liftingmember.

Referring to the drawing and more particularly to FIGS. 1 and 2, thereis illustrated a spool or bobbin having a cylindrical or tubular memberof suitable thickness, preferably constructed of a laminated phenolicplastic material or paper tubes that may be suitably surfaced to providea smooth yarn receiving exterior. At the base of the spool is flange 11of unitary construction molded in one piece to provide a rounded edge 12on the upper face 13 from which projects the tubular member receivinghub 14 concentric with the circular permieter of the flange. The spindlereceiving opening 15 extends axially through the hub 14. A plurality ofopenings 16 is provided in th end of the hub 14 to reduce the weight ofthe flange and to minimize or compensate for any unbalance by reason ofweight distribution of the flange 11. The bottom face 17 of the flange11 is provided with diametrically opposed driving .lugs 18 that extendradially inward within the spindle receiving opening '15. Spaced apartconcentric ribs 19, 20 and 21 provide the requisite high impactresistance and stability to the base flange 11 together with theradially projecting inner series of ribs 22 extending from the innercircular rib 19 to the intermediate circular rib 20. The staggeredradially extending ribs 23 extend from the intermediate circular rib 20to the outer circular rib 21 that is coincident with the perimeter 24 ofthe flange 11.

An annular recess 25 is provided in the top face 13 of flange 12 forcooperatively receiving therein the terminal end 26 of the tubularmember 10 so as to be securely fastened together with a suitableadhesive.

The upper flange 27, also preferably molded plastic, is a unitarystructure in which the diameter may be smaller than the diameter of thelower flange 11. The

3,276,717 Patented Oct. 4, 1966 perimeter 28 of the upper flange isrounded to avoid cutting the fibrous materials. A concentric boss 29 isconcentric with the spindle receiving opening 30 that extends axiallythrough the upper flange and through the projecting tubular-receivinghub member 31 that is substantially identical in construction with thehub 14 and includes the recessed opening 16 in the terminal portion 32of the hub. It will be noted that the flange 13 has on the hub 14 aspindle bearing surface 33 that is similarly provided in the upperflange 27 at the hub 31 to engage the upper portion of the spindle onwhich the bobbin or spool is supported.

A suitable plug 34 in the form of a cap made of plastic or othersuitable material may be releasably supported at a suitable heightwithin the opening 30 of the upper flange 27 or the circular top 35 maybe flush with boss 29. The upper flange is also provided with an annularrecess on the bottom face surrounding the hub 31 comparable to therecess 25 on the lower flange 13 for cooperatively receiving andretaining therein the upper terminal portion 36' of the tubular member10 and securely fastened thereto by a suitable adhesive.

Where desirable, the plug 34 which has a hollow interior within thecylindrical portion and circular top 35 may be replaced with a handle orlifting member 36 provided with an enlarged top or cap member 37. Itwill be appreciated that the plug 34 and the lifting member 36 aremolded preferably of the same material from which the flanges '11 and 27are molded.

Thus, the spool construction eliminates the necessity for dynamicbalancing, initially and subsequently after use, by the moldedprefabrication of the flanges with the concentric recesses forcooperatively receiving the yarn receiving tubular member or barrelproducing axial alignment of the components.

What is claimed is:

A spool for textiles of light weight, high impact resistance and minimalunbalance at high rotational speeds comprising a first circular unitaryflange with one face having a concentric projecting tubularmember-receiving hub with a spindle-receiving opening, the other face ofsaid first flange having diametrically opposed drive lugs adjacent tosaid opening and a plurality of radially ex tending reinforcing ribs andconcentric reinforcing rings of uniform thickness, a tubular membersecured to said first flange over the projecting hub, and a secondunitary flange having a concentric projecting tubular memberreceivinghub with a spindle-receiving opening therein, said second flange beingsecurely fastened to said tubular member with said second flange hubextending thereinto, and a spool lifting member having a smooth exteriorsurface to be slidably and removably supported in said second flangeopening.

References Cited by the Examiner UNITED STATES PATENTS 1,813,990 7/1931DeVry 24268.3 2,381,870 8/1945 Amrhein et a1 Q 242-118.7 2,585,9992/1952 Bunch 242-4621 2,589,389 3/1952 Hurst 242-11861 2,690,885 10/1954 Crooks 242--118.62 2,693,323 11/1954 Jarmicki 242118.7 2,902,234 9/1959 Morin 242-1187 FOREIGN PATENTS 451,873 8/1936 Great Britain.682,692 11/ 1952 Great Britain.

STANLEY N. GILREATH, Primary Examiner.

MERVIN STEIN, Examiner.

G. F. MAUTZ, Assistant Examiner.

